Question

Mica is chemically

• A. potassium aluminosilicate having sheet structure
• B. calcium aluminosilicate having fibrous structure
• C. calcium magnesium silicate having three dimensional network
• D. hydrated sodium aluminosilicate having three-dimensional network.

Answer 1

Answer: (A)

potassium aluminosilicate having sheet structure

Answer 2

Mica is a group of minerals, the most important of which are muscovite ${H_2KAl_3(SiO_4)_3}$ and phlogopite ${H_2KMg_3Al(SiO_4)_3}$ having sheet structure.